Drilling mechanism



March 8, 1932. R. E. MURPHY DRILLING MECHANISM Original Filed May 3.1928 uMR I...

h@ www www@ ms@ y 'gul' Munn-n1 1 motion `or slidingconnectionshovvingfthe' f Patented Mar. 8, 1932 1 i, :nerr-eff srAr-asBrennan EMURPHY, on PITTSBSURGH, PnNNsYLWiNAyA'ssIGNoR mofsntrzivenfeHNERY Germany, nfeonrommron orifrfessecnusnmrsf A Darum@ MeenemenApplication mee may; 3,1928; serial No. e74,e21. Renewed Malen eo,y1931.

This invention relates toldii'lling'mechan y forward Vend Loi the shaft"2 i'sjournaled in avnisms and more particularly, but noteXclu sively,pertains to a rotary coal drilling mechanismespecially adapted to use`vin drilling portion 5 projecting Withinandrioidly linedvrshotorblastholes'in the coal lace;

An object oiithis inventionis toprov'ide an improved drilling mechanismand more Vpar-y ticularly to provide." an' improved feeding'A meansforvsuch a mechanism. lAnother object J is to provide improved feedingmeans for a drilling tool. having embodiedtherein mechanism for'permitting the initial positioning oi the tool toaeilitat the startingof a hole. e Yet: another Objectis to'provide an improved :tool feedingmechanism of the differentialr4 screw type having embodied therein'aslinmotion or sliding connecti'on whereby the? drillingy toolmaybemanual-*lyl slid 'forwardly' inposition at the' coal faceindependentlyY ofV "the feedl screwmechanismtofacilitate v positioningof the toolduring starting of allele;r

These andvother obj eets offtliis invention will however subsequentlymore fully appear as the description proceeds;-

ln the accompanying*dravvingsvthere is shown for purposes of'illustrationy one form which the invention'may assume iny pract1celntheseidrawin'sr# j n n Fig'.- lisia central longitudmally jeitend'-l ingmechanism having the inventione1nbodied therein. 'l Figs. .and ,3 are,`

Figill. e y l .Y f

Fig; lis a detail view of the im'iroved vslip parts in a differentpositionv romthat'shown inFig,1 i ff y ln fthis illustrativeconstruction the imjproved means ier initially ypositioning the drillingtool for facilitating the starting of a` hole is shown incorporated in adrilling mechanismo the same general type vas that described inthecopenlingapplication of one Morris P. Holmes,y Serial No.V 25,5,754,`filed February20, 1928. Thisdrillingmechanism n n lleasing7`v Hereinsupported A onev the drive sleeve 28 and in turn'supportingthe bearingsleeve 25v is aj retaining' sleeve or bushing" r31 comprises anadjustable tubular supporting ing vertieal vsectional vieivillustratinga drilldetail' sectional views taken respectively' on lines 2-52 and--fol to `a'usual driving` motor (not shown).` The ball bearing" 3supported Within a swivelM frame` or bearing bracket lhaving'a sleeveVto kthe tubular arm l. Sivivelly mounted on the swivel bracket'fl isadrill 'generally desi gf; nated 6 and comprising a-plura'l part 'easing'or rfAreNr `orercir-Ef3 housing`7 `provided'yvith anannular flange 8rotatablyimounted in a bore 9 Vformed Within]` rthe swivel` bracketrAlso secured' to" the Casing 7y as byscrevvs lO is a swivel plate 'Khaving lagrlng or annularflanged porti'onjl2y i rotatably mountedin abore' 13 formedin the swivel" brackets and arranged in axialalinementwiththe bore 9L' Itivvill thus be seen n 1 tliatthe drill 6maybe bodily swung relative" to the 'swivel brackets: about anaxisperpenf vdicularto the axes 'of the transmission shaft 2 and thetubular supporting arm 1v.' In order vto securethe drill to theswivelbraclet inits different adjusted positions a' manually.` e'

operable clamping screvv lllis providedithis serevv beingthreadedlyconnected-to thef bracket 4' and engaging"I the bottom ofA av peripheralgroove' l5 formed ion the swivel Y plate ll.` 'Y l As illustrated', thetransmission shaft2 has fixed vthereto abevel-pinion l'6 meshing e4sleeve y2:5.- This 'spur geark 24I-has a sleeve -v Vportion carryingclutch plates 426Whi'eli ,are

interleaved with clutch 'plates 27 carried by e a rotatabledrivingsleeve or spider 28."A Thisl vdrive'sleeve is journaled in ball'bearings29` and 30 suitably supportedv Within the drill" interposedbetween the adjacent endsof the clutch plate and the bearing 30.Encircling the drive sleeve 28 and slidably mounted thereon is a clutchapplying member 32 normally held in clutch applying position by al coilspring 33 encircling the drive sleevel 28 and reacting against a sleeve34 abutting against an adjustable collar 35 tlirea-dedly connected tothe rotatable drive sleeve 28. As

Y 42 for the drilling tool.

As shown, the gear 23 meshes with a spur gear r45 having a differenttooth ratio from the gear 24 and rotatably mounted on a bearing sleeve46. This gear 45 has a sleeve portion which carries clutch plates 47which are interleaved with clutch plates 48 carried by a drive sleeve ortubular drivemember 49.

` This sleeve member 49 is keyed at 50 to a memberl in turn keyed at 52'to a sleeve or tubular drive member 53, the sleeve 49 being mounted onthe member 53. The tubular drive sleeve 53 is journaled in ball bearings54 and 55 suitably carried within the drill casing. The member 51 isinterposed between 'the clutch plates and the bearing 54 and forms asupport for the bearing sleeve 46. lAs illustrated the tubular member 53is provided with a radial flange 56 interposedr between the inner raceof thecontiguous ball bearings and a ball thrust bearing 5,7.,l jSlidably mounted on the sleeve 491s a clutch applying member 58 normallyheld in clutch applying position by a coil spring 59 encircling thesleeve 49 and reacting against a sleeve 60 engaging Van adjustablecollar 61,.

threadedly connected to the sleeve 49. The mechanism for releasing thedrive clutch 26, 27 and the feed clutch 47, 48 is substantially the sameas that kdescribed in the copending application mentioned above andsince 'it does not specifically enter into this invention furtherdescription 'is deemed unnecesary.

In accordance with this illustrative form l' of the invention thetubular member or drive sleeve 38 has formed thereon at its rear end afeed nut 62 threadedly connected 'to a. .feed screw 63 extendingcentrally within the driving sleeve 38, this feed screw being adapted tomove inwardly and outwardly with respect yto the drive sleeve 38 as willhereinafter be deseribedl Keyed at 64 to a rearward extension 65 formedintegral with the feed .screw 63 is a member 66 held in position by alock nut 67 fthreadedly connected to the extension 65. This member 66has laterally projecting keys 68 engaging longitudinal flutes or keywaysextending throughout a portion of the bore within the drive sleeve 53,as clearly shown in Fig. l. The rear end of the drive sleeve 53 isclosed by a cap member 69 against which the rear end of the member 66 isadapted to abut during the feeding operation of the mechanism as willlater be described. T his cap member 69 is provided with a recess 70within which the lock nut 67 is adapted to enter when the feed screw isin its retracted position.

In the operation of the improved drilling mechanism the tubularsupporting arm is adjusted in a manner clearly described in theeopending application mentioned above and the drill suitably positionedadjacent the coal face. The operator then inserts the drilling tool 41within the chuck 39 and then grasps the chuck casing and moves thedrilling tool forwardly yuntil the cutting bit engages the coal face,the tubular drive sleeve 38, the feed screw 63, and the member 66sliding axially relative to thesleeve 28 and tubular member 53. Afterthe drilling tool of the drill is positioned adjacent the coal face, thedriving ymotor is started and the'operator then suit;

ably 'manipulates the clutch controlling means thereby moving the clutchmembers 32 and 58 into released position, the coil springs 33 and 59automatically applying the clutches. .Since the gear 45 rotates at aspeed `slower than the gear 24 the tubular drive member 53together withthe feed screw 63 are rotated at a. speed slower than the tubular drivemember 38 yand as a result the feed screw 63 is fed slowly rearwardlyfrom the position shown in F ig. 1 until the member 66 engages the cap69-as shown in Fig. 4. W'hen the member 66 engages this cap axialrearward movement of the feed screw is prevenu ed and consequently,since the tubular drive sleeve 38 rotates at a speed slightly fasterythan the feed screw 63, the feed nut 62 moves axially forwardlyrelative to the feed. screw thereby feeding the drilling tool into thecoal at a relatively slow drilling speed. After the hole is completed orif it is desired to change the drilling tool `the operator releases theclutch applying member 32 while the clutch 47, 48 remains applied.'Resultantly the tubular drive sleeve 53 together with the feed screw 63arey rotated relative to the then stationary feed nut 62 andconsequently the feed screw moves forwardly axially ata relatively highspeed from the position shown in Fig. 4to the position shown in Fig. 1.The feed screw andthe tubular drive sleeve 38 thereupon turn togetherwith no axial feeding movement. y The operator then grasps the chuck 39and manually slides the tubular drive member 38, feed screw 63, andmember 66 rearwardly into their initial starting posimissie,

l tion,` these partsy being shoved` rearwardly untiltlie memberv 65engages the capy 69;'

:As a-.resiilt of this inventionit'vv'ill be noted that aniniprovedrotary coal drill isprovided CTT ,asaresult.thestartingofaliole is clearly facilitatedy Vitliaving been found that if thedrilling tool nfere'rotated duringtlie starting of a liole the drillingtoolivobbles oonsider- ',alilv and` the tool is deflected from itsdesired location, Fnrtliermore it will be noted that improved ineansisprovided for initiallypositioiiing. the drilling tool V.therebyfacilitating Y the startingof a hole`V the positioning means dliatlclaim as new and; desire to sec-ure;

- and povvervr operated feeding means therefory mi by Letters Patent.is:

and yfeeding means therefor including coacting,relativelyrotatablefeeding elements, and rotating means for one of the same including...feeding elements i relative to saidrotating. means toinitially'positionsaid tool.:

2, ln a drilling mechanism7 aldrilling tool.,I

and fee-'din means therefor including vcoacf# b means' for one of thesaine including ."no' elements-relative to said rotate' J'. .r3 l ymeans to initially position said tool; said rotating lmeans thereafterbeing-operative to rect feeding movemontofsaid tool.

3; In. a'drilling mechanism -a drilling tool, and feedingmeans thereforincluding coactj atively rotatable feeding elements, and f means for oneof the saine, said rongineans permitting-free axial movement aid feedingelements relative to tlievsame to initially position said tool,

t in a ,drillinoineolianism"a drillin 0*. toolv ing relativelyrotatableffeedingelements, and

rotatingmeans for one of the same; said ro tating'means permitting .freeaXi alf movement of said feeding elements relative to the same .tninitially vposition said tool, said feeding ave-,lement and vrotatingmeans thereafter bee having improved .1 screw operatedy feeding means ofthediferentialtype andliaving einbodied thereinl a slip motion or'sliding cone f nection whereby the drilling tool maybe initiallypositionedy acont. the coal face iandseing of an'enceedinglysimple'cliaracter and the scope ina drilling mechanism, a drilling tool,

ineanspermitting free axial movement of saidl o" relatively rotatablefeeding elements7V andy s permitting free axial movement off and feedingmeans therefor including coactsaid-tool.

ingloperative to eect A.feeding movement. vof

5. ln a drillingmechanismi a drillingftool,

and power operated feeding fmeans therefor' .l including enactingrelatively rotatable feed screw andgnutfelenients,` and rotating means.forone of said elements including nieansper-rA mitting free axialmovement of saidl screw.

and nnteleinent's relative to said rotating: n

position said tool during.\.75 I

means to initially starting of a hole.

6. lira drilling mechanism,a drilling tool, and potveroperated feedingmeans therefor includingreacting relatively rotatable feed., Y

'v screwl and i nnt. elements, androtating means for. one of saidelements including means per mitting `free axial movement of` said:screw rand nut elements relative to'said rotating.,r meansy toinitiallyposition 'said tooldnring' starting of alicie, said rotating meansandf41 screw and nut elements `thereafter being-operativeto eect feedingmovement of said tool.

'i'. In aV drilling meclianism ar drilling tool,v

and power operated feeding means therefor including coasting"relatively. rotatable feed" screw andy nut elements, and .rotating means.for one of the saine,said `rotatiiig means peri mittingfreeaxialmovement of said feeding element 4rotated. thereby and said otherfeed; infr'r Lelement said tool during starting ofa hole.

8. .ln a kdri lling mechanism', a drilling tool,

including rcoacting relatively rrotatable feedv screw andnntjeleinents,androtating means for oneof the saine', said rotatingmeans permitting :free axiallmovement ofv said feeding :element rotatedthereby l .ing element relative. thereto to initial'ly'posi-` 'tion.said tool during :rotating means: and said screw and nut ele:`

ments .thereafter being operative' to" effectfeeding .m'cvementof saidtool; 9. In a drillingmechanism,a drillingtool', v and power operatedfeedingv means therefor including coacting relatively ro'tatablefeedscrew and nnt elements, androtating,:means"v for one of the ksameinclnding'av sliding 0011-. k1,15

nectionbetweeny the element rotated by said axial movement of saidfeeding tive to said rotating means to` tionsaid tool dnringfstarting ofa hole.

l0. lira drillingvmechanism, a drilling tool, i l'tlierefor includingcoacting relatively` rotat# vable feed screw and nut elements, androtating means yfor .one of the sameinclnding .a sli connection betweenthe element rotated by said rotating means and the latter per-vinitially position said tooldnringstarting of a lio-le, said rotatingmeans and screw and nut and said! other feed- 105v starting of a hole,saidI rotating means and the latterpermitting free. elementsrelainitially posiand power operated feeding y'means relative theretotol initiallyr posi# initting freeanial movement of said feeding .lelements relative to Vsaid rotatingmeans to f elements'thereafter beingoperative to effect feeding movement of said tool'. Y

11. 4In a drilling mechanism, a drilling tool, and power operatedyfeeding means u therefor including coacting relatively rotatable `feedscrew and nut elements, and rotating means for said screw includingmeans permitting free axialmovement of said screw and nut relative tosaid rotating means to ef- M'fect initial positioning of said toolduring starting of a hole.

12. In a drilling mechanism, a drilling tool, and power operated feedingmeans ltherefor including enacting relatively rotatable 1J feed screwand nut elements and rotating means for said elements for effectingrotation of the same at different speeds, said rotating means includingmeans for permitting free axial movement of said feeding elements relfeiitive to said rotating means to effect initial positioning ofsaid toolduring startingdof a hole. l

13. In a drilling mechanism, a drilling tool, and power operated feedingmeans there- ,..S'lfor Aincluding' coacting relatively rotatable feedingelements, and rotating means thereforr for effecting rotation thereof atdifferent speeds, said vrotating means including means W permitting freeaxial movement of said feed- .fsoing elements relative thereto to effectinitial positioning of said tool during starting of a hole.

14. In a drilling mechanism, a drilling tool, power operated reversiblefeeding means for `-said tool for feeding the latter forwardly and yrearwardly' including an axially movable feeding element, poweroperating mechanisms therefor, and a tool carrying elementy M.movableaxially relative to said feeding ele- 40""ment, and means permittingfree axial movement of said feeding element and said tool carryingelement, relative to the power operating mechanism of the former toeffect initial iositioning of said tool upon starting of a whole. a i YY l5. In a drilling mechanism, a drilling tool, and feeding meanstherefor including coacting feeding elements having relative yaxialiiiov'e1iient, actuating means for one of said ""fceding elements, atool carrying member movable axially with one of said feeding elementsand relative to, the other feeding element, and ymeans permitting freeaxial.

movement of said tool carrying member and ithat feeding element relativeto which saidr tool carryingk member is movable bodily relative to saidactuating means to initially position said tool. y

16. In a drilling mechanism, a drilling `tiool, and feeding meanstherefor including coacting feeding elements having relative axial andrelative rotative movements, rotating means for one of said elements, atool A carrying member movable axially with one of w'said feedingelements, and means permitting free axial movement of said feedingelements relative to said rotatin means wh1le the coacting relation ofsai feeding elements is maintained to initially position said tool.

17. In a drilling mechanism, a drilling tool, and feeding means thereforincluding coacting feeding elements having relative axial and relativerotative movements, rotating meansrfor one of said elements including afinal rotating element, a tool carryin member movable axially with oneof said ceding elements and relative to said final rotating element, andmeans including a sliding connection between one of said feedingelements and said rotating element permitting free axial movement ofsaid feeding elements relative to said rotating means while the coactingrelation of said feeding elements is maintained tofinitially positionsaid tool.

, 18.'In a drilling mechanism, a drilling tool, and feeding meanstherefor including coacting relatively rotatable yscrew and nutelements, a tool carrying member movable axially with one of saidfeeding elements, rotating means for the other of said feedingelements,y and means permitting free axial movement of said latterfeeding element bodily relative to its rotating means to initiallyposition the tool.

19. In a drilling mechanism, a drilling tool, and feeding means thereforincluding coactingrelatively rotatable screw and nut elements, a toolcarrying member movable axially with one of said elements and relativeto the other element, rotating means for said feeding elements includinga final rotation element, and means including a sliding connectionbetween one of said feeding elements land said final rotation elementpermitting free axial movement of said feeding elements bodily relativeto said rotating element to initially position the tool.

20. vIn a drilling mechanism, a drilling tool,` feeding means thereforincluding coacting relatively rotatable feeding elements,rotatingmeansfor saidfeeding elements, and means permitting free axialmovement of one of said feeding elements relative to its rotat-A ingmeans to initially position said tool.

21. In a 'drilling mechanism, a drilling tool, and feeding meanstherefor-including coacting relatively rotatable screw and nut elements,means for effecting rotation of said screw and nut eleinent-s atdifferent speeds to effect axial movement of one of the same relative tothe other, and means permitting free axial movement of one of saidfeeding elements relative toits rotation means to initially position thetool.

22.y In a drilling mechanism, a ydrilling tool', and feeding means forsaid tool including, coacting relatively rotatable screw and nutelements, a tool carrying member connected to one of said feedingelements and movableaxially relative tothe other, meanstoolcarryingmember,and a sliding connec- V, tion between sind screwelement and its roment ofsaid ktion the tool,r

ltation means permitting free `axial move- 23. lnra drilling mechanism,adrilling tool,

- rotation means for said tool including arotating member land memberslidablyy connected ytherewith and rotatable thereby, and feeding meansfor sliding said members azio iallyto effect feeding of the toolincluding co'- operating feeding elements one of which is connected'tosaid sliding member, rotating means'for the other feeding element, anda` sliding connection between said feed elementA rotating means andsaidlatter feeding element. A 7 n '24. In a drilling mechanism, a` drillingtool, rotation means for said tool includ-A ing cooperating rotatingmembers having relative axial movement, and feeding means for -the too-lincluding cooperating feeding elements one ofwhich is connected toV oneof said relatively axially movable members, rotating means for the otherfeeding element, and a sliding connectionbetweeii said Vfeed relementrotating means and'said latter feeding element. Y i

'25. ln a drilling mechanism, a drilling tool, rotation means for saidtool including a rotating member and a tubular member having splinedconnection withtliek rotating inem-v ber andrmovable aXiallytherethrough', and feeding means for the tool including a rotatingtubular member, a sliding member Vhaving splined connection therewithand rotatable thereby, said member being movable axially relativethereto during rotation' thereof, and cooperating relatively rotatablefeeding elements, one connected with said tubiilairotating feed memberand the yother ,connected with said sliding feed member. i

,- Zlln a drilling mechanism, a drilling tool, rotation meansfor saidtool including ,a rotating member, a `taibulafr member havingsplinedconnection with the rotating' member and movable axially therethrough,

and feeding means for the tool including ra 'rotating tubular member, asliding member having' splined connection therewith and rotatablethereby, said member being movable axially relative thereto during`rotation thereof, and cooperatingrelativelyl rotatable feeding elements,one connected with said tubular rotating feed memberand the otherconnected with said sliding feed member, said feeding elements and saidsliding feed member beinc` movable aXiall f relative to said tubularrotating feed member to permit bodilyniovement of the tool initiallyJ toposition the latter,YV

27. In va `drilling mechanism, a

screw element to initially posi# a `'tatablethereby,*said member beingmovable axially relative `thereto during rotation thereof, andcooperating yre'latvely.,rf'itatable ,feedv` sci.ewanclf mit feeding lelements, one! con!v f a rotatingmember, a ytubular member havingsplinedfconnection withjthe 'rotating member and' movableaxiallyrthe'rethrough, and 'feeding meanst for. the tool includinga ro-`Ytating tubular` meniber,. a sliding member having splined connectiontherewith andaronected with, said ,tubular rotating feed ineinber andtool, rotation for said tool including Y ay rotating meniben'atubnlarmember ghav- "ing 1splined connection with the, rotation`'membei'c and movablev axially therethrough,

and vfeeding meansfor thetool includinga rotating tubular member, asliding kmember having splined connection .therewith and ro- U ,e ,otherconnected with -saids'lid- Ving-feed'rieinber.

ifi a ,daling-mechanism, aariiiiag so tlatable thereby, saidinembeiobeing movable` axially relative thereto during rotationtherescrewA and 'nut feeding"V elements, one vconber and the otherconnectedwith said sliding'feed member,`said feedingelements and saidsliding feedmember being movable aXi-YY allyrelative to said tubularrotating feed* member; to permit bodilyk movement ofthe tool initiallyto position the latter. l 29. In a drilling ymechanism, a drilling of,andeooiierating relatively rotatable-:feed Y i en nected with saidtubular rotating feed memy tool and feeding means for said toolincluding coacting feeding elements having relative axialmovemennactuating means for one of saidfeeding elements, a tool.carrymember-movable axiallywith one of said Vfer-:ding elements andrelative to the other n, feeding element, and means permitting freeaxial movement of saidtool carrying member and that' feeding elementVrelative tok which said tool carrying member-,is movable,

30. In a drilling mechanism, a Ldrilling tool and feeding means for saidtool includi ing coactiiig screw and nut feeding elements havingrelative axialand relative .rotative movements, rotating means for oneof said elements, a toolk carrying member movableV axially with saidother feeding element, yand means .permitting freeaXial movement of saidfeeding elements relative to said rotatico ing means while the coactingrelation of said feeding elements is ,maintained initially to positionsaid tool, one of said feeding ele-y ments moving rearwardly apredetermined distance after suchinitial positioning and.y prior to thefeeding of said tool.

drilling tool,rotation means for said tool including A,

,31. In a drilling mechanism, a drilling rotating member, and a tubularmember hav ing splinedconnection therewith and movable axially relativethereto, and feeding means for said tool including a feed member carriedby said tubular member and a coactv ing feed member telescopicallyarranged within said tubular member, said feed members being 'movablefreely axially with said f tubular member initially to position saidtool. o 32. In a drilling mechanism, a drilling tool, rotating means forsaid tool including a rotatingmember and a tubular member Yhavingsplined connection therewith and movableA axially relative thereto, andfeedy 1 means for said tool including a rotatable n tu ular member, afeed member carried by said first tubular member, and a coacting` feedmember rotatable withsaid second tubular member and telescopicallyarranged n gn within said tubular members, said feed members beingmovable freely axially relative to said second tubular member initiallyto po#v sition said tool. f, In testimony whereof I affix my signature.fr. RICHARD E. MURPHYQ Lehi" Maf.. y

